Wondering if you can help me with a website problem I am having. I am building an app on facebook and running into this problem. The app requires the web address from which it will pull the info. to end with / ; as in .html/ or .php/

This may not help, but your urls can look like mysite.com/folder/ if you are targeting the index.php / index.html file in that folder.

Otherwise, you may need to look at some kind of server configuration to rewrite the urls. Perhaps provide some more information about what you are trying to do / what conditions you are working with so that someone can advise further.